#! /usr/bin/perl -w -I .. # # Subagent for testing check_snmp # #use strict; # Doesn't work use NetSNMP::OID qw(:all); use NetSNMP::agent; use NetSNMP::ASN qw(ASN_OCTET_STR ASN_COUNTER ASN_COUNTER64 ASN_INTEGER ASN_INTEGER64 ASN_UNSIGNED ASN_UNSIGNED64); #use Math::Int64 qw(uint64); # Skip that module whie we don't need it sub uint64 { return $_ } if (!$agent) { print "This program must run as an embedded NetSNMP agent\n"; exit 1; } my $baseoid = '.1.3.6.1.4.1.8072.3.2.67'; # Next are arrays of indexes (Type, initial value and increments) # Undef miltipliers are randomized my $multiline = 'Cisco Internetwork Operating System Software IOS (tm) Catalyst 4000 "L3" Switch Software (cat4000-I9K91S-M), Version 12.2(20)EWA, RELEASE SOFTWARE (fc1) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2004 by cisco Systems, Inc. '; my $multilin2 = "Kisco Outernetwork Oserating Gystem Totware Copyleft (c) 2400-2689 by kisco Systrems, Inc."; my $multilin3 = 'This should not confuse check_snmp "parser" into thinking there is no 2nd line'; my $multilin4 = 'It\'s getting even harder if the line ends with with this: C:\\'; my $multilin5 = 'And now have fun with with this: "C:\\" because we\'re not done yet!'; my @fields = (ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR, ASN_OCTET_STR, ASN_UNSIGNED, ASN_UNSIGNED, ASN_COUNTER, ASN_COUNTER64, ASN_UNSIGNED); my @values = ($multiline, $multilin2, $multilin3, $multilin4, $multilin5, 4294965296, 1000, 4294965296, uint64("18446744073709351616"), int(rand(2**32))); my @incrts = (undef, undef, undef, undef, undef, 1000, -500, 1000, 100000, undef); # Number of elements in our OID my $oidelts; { my @oid = split(/\./, $baseoid); $oidelts = scalar(@oid); } my $regoid = new NetSNMP::OID($baseoid); $agent->register('check_snmp_agent', $regoid, \&my_snmp_handler); sub my_snmp_handler { my ($handler, $registration_info, $request_info, $requests) = @_; for (my $request = $requests; $request; $request = $request->next) { my $oid = $request->getOID(); my $index; my $next_index; # Validate the OID my @numarray = $oid->to_array(); if (@numarray != $oidelts) { if ($request_info->getMode() == MODE_GETNEXT && @numarray == ($oidelts - 1)) { # GETNEXT for the base oid; set it to the first index push(@numarray, 0); $next_index = 0; } else { # We got a request for the base OID or with extra elements $request->setError($request_info, SNMP_ERR_NOERROR); next; } } $index = pop(@numarray); if ($index >= scalar(@fields)) { # Index is out of bounds $request->setError($request_info, SNMP_ERR_NOERROR); next; } # Handle the request if ($request_info->getMode() == MODE_GETNEXT) { if (++$index >= scalar(@fields)) { # Index will grow out of bounds $request->setError($request_info, SNMP_ERR_NOERROR); next; } $index = (defined($next_index) ? $next_index : $index); $request->setOID("$baseoid.$index"); } elsif ($request_info->getMode() != MODE_GET) { # Everything else is write-related modes $request->setError($request_info, SNMP_ERR_READONLY); next; } # Set the response... setValue is a bit touchy about the data type, but accepts plain strings. my $value = sprintf("%s", $values[$index]); $request->setValue($fields[$index], $value); # And update the value if (defined($incrts[$index])) { $values[$index] += $incrts[$index]; } elsif ($fields[$index] != ASN_OCTET_STR) { my $minus = int(rand(2))*-1; $minus = 1 unless ($minus); my $exp = 32; $exp = 64 if ($fields[$index] == ASN_COUNTER64 || $fields[$index] == ASN_INTEGER64 || $fields[$index] == ASN_UNSIGNED64); $values[$index] = int(rand(2**$exp)); } } }